How difficult is it to respond

Last week Monday I called in to obtain my settlement amount. I received a prompt response with my payment amount and banking details for the payment via email as I had requested. The payment was made the same day and confirmation of payment was sent however I have yet to receive any confirmation of receipt. I have limited time available during working hours to contact them - I have tried calling 3 times and cannot hold for countless minutes each time with no answer. Please send me confirmation via email that the payment has being received and that the account has being closed.